The impedance was measured from 20 Hz to 20 kHz and is presented as traditional stacked amplitude vs. frequency and phase vs. frequency plots and on a Smith Chart as I have described in previous reviews. The impedance of the Tigris is specified at 4 ohms. The impedance drops to this level over most of the audio band, but rises to well above 10 ohms at a peak around 55 Hz (revealing the port tuning) and at around 500 Hz. The wide variation in both the magnitude and phase of the impedance indicates that you will need an amplifier that has plenty of power, and the specs state a 100 watt RMS minimum.

Total harmonic distortion measurements made at frequencies of 50 Hz, 1 kHz and 10 kHz show good results, similar to my Gallo 3.1s, but not quite as good as the Thiel 3.7s or Legend Tikandis I reviewed in the past.

The frequency response was measured at 1 meter on axis from a single speaker, both at midrange height and listening height and at the listening position with both loudspeakers. In both cases, the test tone was white noise.

At 1m from the speaker and at the height of the midrange driver, the response shows broad response peaks at around 1.5 kHz and 80 Hz, or a response valley between 100 Hz and 1 kHz, depending on how you want to look at it.

At listening height, the midrange peak is gone, but the peak at around 80 Hz still remains. It is exacerbated by a room suck-out (a null in the floor-ceiling standing wave) at around 150 Hz.

At the listening position, the bass is smoothed out, but the 1.5 kHz peak shows a little. A fairly prominent broad peak at 100 Hz is also visible.